12233122221 has 4 divisors (see below), whose sum is σ = 16310829632. Its totient is φ = 8155414812.

The previous prime is 12233122183. The next prime is 12233122267. The reversal of 12233122221 is 12222133221.

12233122221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 12233122221 - 2¹¹ = 12233120173 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12233122721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2038853701 + ... + 2038853706.

It is an arithmetic number, because the mean of its divisors is an integer number (4077707408).

Almost surely, 2^12233122221 is an apocalyptic number.

It is an amenable number.

12233122221 is a deficient number, since it is larger than the sum of its proper divisors (4077707411).

12233122221 is an equidigital number, since it uses as much as digits as its factorization.

12233122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4077707410.

The product of its digits is 576, while the sum is 21.

Adding to 12233122221 its reverse (12222133221), we get a palindrome (24455255442).

The spelling of 12233122221 in words is "twelve billion, two hundred thirty-three million, one hundred twenty-two thousand, two hundred twenty-one".